MODELS OIL IN MY 4.0 V/8 AIR FILTER

This 4.0 V/8 car runs swell, smooth and quiet. But I notice some oil when I went to change my air filter. There was about well maybe enought to make you take notice.
First I though {PCV} or the tubing. But the car has a
restricker. No PCV. I cleaned the air filter container replace it with a new Fram. The car does't smoke exhause is clean. I have heard others say replacing the restrickers and hoses. One fellow said they make a divider gadget. Air goes one way and any oil goes where it is suppose